Roasting device



Jan. 2, 1940. JLA. DUMAS noAsTme DEVICE Filedr Aug.` 5,` 1939 2 Sheets-Sheet 1 \%m\ W wh, m m m m Qi, B E g W ww m l .....v k. uw .h no .N .LQ .m5

,.T if l Y ATTORNEYS.

2, 1940. J DQMAS n A l. n .2,185,979

ROASTING DEVICE Filed Aug. 5. 1939 2 Sheets-Sheet 2 'A ATToRNEY.

Patented Jan. 2, 1940 ROASTIN G DEVICE Joseph Arthur Dumas, Brooklyn, N. Y., assignor of one-half to Romaine B. Stoker, Mount Vernon, N. Y.

Application August 5, 1939, Serial No. 288,544Lf 5 claims. .(cl. z1919i This invention relates to amachine for roasting frankfurters and the like and has for an object to provide a roaster in which the frankfurters or the like are automatically turned for I the even application of heat on all sides thereof.

Another object is to provide a device of the above type having means for quickly bringing certain of the heating rolls up to the desired temperature.

Another object is to provide a rotatable heating roll having novel and improved details of construction. y

Another object is to provide a simple and eilicient mechanism for making electrical connec- 5'. tions 4to the rotating rolls.

Another object is to provide a simple, dependable, eiiicient and commercially practical device of the type above indicated.

Various other objects and advantages will be 20 apparent as the nature of the invention is more fully disclosed.

The novel features which are believed to be characteristic of this invention are more fully pointed out in the claims appended hereto. The

g invention itself may, however, be better understood by referring to the following description, taken in connection with the accompanying drawings, in which a speciiic embodiment thereof has been set forth for purposes of illustration.

u` In the drawings:

Fig. 1 is a top plan view of a roasting device embodying the present invention, with parts broken away to show the details of construction. Fig. 2 is a vertical longitudinal section taken on u the line 2- 2 of Fig. 1.

Figs. 3, 4 and 5 are vertical transverse sections taken on the lines 3-3, 4-4 and 5-5 respectively of Fig. 1.

Fig. 6 is a broken section throughv a heating a roll showing the construction thereof, and,

- `Fig. 7 is a schematic wiring diagram showing the connections of the various rolls.

Referring to the embodiment of the invention illustrated in the drawings, the roasting device is shown in Fig. l as comprising a rectangular frame I having a pair of transverse partitions and I2 in which a plurality of heating rolls I4 are journalled. The rolls I4, as shown more in detail in Fig. 6, each comprise a metal tube m I5 having an inner liner I6 of refractory material such as porcelain or the like. A heating coil- I1 is disposed within the liner I6. Each end of the liner I6 is closed by a disc I8 of insulating material which is held in place by a hub I8 havu, ing an annular flange which is secured within thev tube |5. The hubs I9 comprise the bearing surface for the roll and are suitably journalled in the partitions and |2. A contact bolt 2| 'extends through an insulating bushing 22within the hub I9. "Ihe end of the heating coil |1v is .i electrically connected to the head 23 of said blt. The bolt is held in position by nuts 24 andv is provided with a tip 25 which forms a contact point for making outside contact to the heating coil I1. One of the hubs I9 carries a worm wheel l0 26 by which the roll |4 is driven, as will be de scribed.

The tips 25 of the bolts 2| engage contact plungers 30'which are slidably mounted in walls 3| and are spring pressed inwardly by spring con- 18 tact members 32. The contact members 32 are mounted on the walls 3| and provide means for making contact to an external circuit.

The worm wheels 26 are all driven by a worm shaft 35 which is mounted on suitable brackets 20 36 secured to the frame I0 in any convenient manner and is driven by aworm gear 31 carried by a shaft 38. The shaft y38 is driven through a suitable reduction gear driven by means of an electric motor 40 which is mounted within the 25 frame |0 in a compartment formed between the wall 3| and the end of said frame. The motor may be provided with a fan 4| to circulate cooling air therefrom. The ends of the motor compartment` may be provided with ventilating'apertures 30 I 42 tov permit the proper circulation of air over the motor.

'Ihe electrical connections are shown in detail in Fig. 7. A connection is made from one of a pair of mains 45 to the contact strip 32 associated 33 with an end roll I4. The other contact strips are suitably interconnected as by leads 46 to 50 for connecting the various rolls in series. The connection is made from the final contact strip by a lead 5| to contact 52 of a double throw switch 53, 4u the blade of which is connected by a lead 54 to a switch 55 and thence by a lead 56.to the other side of the main 45. The second contact 51 of the double throw switch 53 is connected by a line 58 to the lead 48 interconnecting the two center 45 rolls. A connection is also made from the lead 41 through a push lswitch 59 and lead 60 tothe return side of the main 45. The motor 40 is connected across the main 45 through a switch 6|. Switches 53, 55 and 6| may be mounted on the 50 frame I0 asfshown in Fig. 1. The switch 59 is shown as mounted on the end of the frame I0 and provided with a plunger 62 which is adaptedA to bereadily engaged and held in by the operator, for the purpose to be described. The compartof.- standard construction and may be provided.

with the usual heating elements which may be connected by means of a switch 61 across the main 45. In certain instancesone of the plates such as the plate 66 may .constitute a supporting trayonly in which event the heating may be omitted therefrom.

In the operation of this device the current sup.- ply to the rolls lli is controlled by the switch 55 which is normally closed when the device is operating. The switch 6l serves to close the circuit to the motor d0 as to cause the rolls to be driven f thereby at a comparatively slow speed. In normal operation the rolls are series connected through the contact 52 of the switch 53 so that they are'all maintained at proper roasting temperature. The frankiurters or the like are placed between the various rolls and are slowly turned as the rolls are rotated so that they are evenly roasted on all sides.

In certain instances it may be desired to bring certain of the rolls to a higher temperature. For this purpose the switch 53 is operated to make contact with the contact 51 thereof, thereby .connecting the three top rolls, as viewedin Fig. 7, in series across the main 65. This of course causes increased current to iiow through these rolls. At the same time the remaining three rolls are entirely disconnected. After the rst three rolls have been brought to thedesired high temperature the switch 53 may be again actuated to connect all of the rolls in series. The lower rolls, as seen in Fig. 7, will then operate at a temperature lower than the upper rolls and may be used for keeping the frankfurters warm after they have been roasted on the hotter rolls. It is to be understood, of course, that this sequence of operations is illustrative only and that various combinations may be effected as desired.

The switch t2 serves to connect two rolls in series across the main d5. This is f or the purpose of heating up two of the rolls rapidly, as for example, when `the apparatus is started in operation in the morning. A considerable period of time might be required for heating all of the rolls to a roasting temperature. The switch 59 accordingly permits certain of the elements to be quickly brought to operating temperature and avoids necessity for waiting until the entire machine has been brought to temperature before beginning roasting operations;

'I'he hot plates S5 and 66 may be used for toasting buns or the like to .be used with the frankfurters or may be'used for keeping the frankfurters warm after they have been roastedl on the rolls It. l

It is to be noted that the individual rolls may be readily removed from the apparatus without disturbing the electrical connections -and that an electrical contact is always maintained to the rotating rolls by means of the spring pressed contact members 30 and the rotating tips 35 of the contact bolts 2l.

The driving mechanism may be `modified in various ways. For example, the motor may be connected to drive a set of fiber discs or the like which may be mounted on the partition I2. Similar idler discs may be mounted on the partition heating current to said certain elements.

l l in a position such that the rolls"x M may merely 'rest upon the discs and be driven thereby. In

that event, the electrical contact pins 30 may be mounted in the partitions Il and I2 so that the rolls It may be lifted out of the machine for 5 purposes of cleaning'repair or replacement with- Vout requiring adjustment or modification of the driving mechanism or of the electric connections. While the device is intended primarily for the 4roasting or frankfurters or the like, it is to be 10 therein as-will be readily apparent to a person 15 skilled in the art. Certain specic terms have `been mentioned herein for convenience in referring to various details of the invention but the invention is only to be restricted in accordance with the following claims.

I claim:

1. A roasting device comprising a pair of parallel rolls spaced to receive and support an article to be roasted, means rotating said rolls in the same direction so as to turn said article during l5 the roasting operation, and heating means for said rolls. y 2. A roasting device comprising a pair of parallel rolls spaced to receive and support an article to be roasted, means rotating said rolls in thel) same direction so as to turn said article during" the roasting operation, said rolls having electrical heating elements disposed therein and means supplying heating current thereto.

3. A roasting device comprising a pair of paral- ,1%

lel rolls spaced to receive and support an article' to be roasted, means rotating said rolls inthe same direction so as to turn said article during the roasting operation, said rolls each having electrical heating elements .disposed therein contact means connected to said heating elements'4 and located at the ends of said rolls and means making electrical contact with said contact means for supplying heating current to said heating elements. 4. A roasting device comprising a pair of parallel rolls spaced to receive and support an article to be roasted, means rotating said rolls inthe same direction so as to turn said 'article during the roasting operation, electrical heating ele-Fm like comprising a plurality of parallel rolls spaced toreceive and support said frankfurterstherebetween, means driving all of said rolls in the, same direction for causing said frankfurters to bei continuously turned as they are roasted thereby, electrical heating elements disposed in each of said rolls, means normally connecting all of said elements in Sel'eS, a Supply line for supplying ,5 heating current thereto and switch means associ 'ci ated with said device for disconnecting certain of said rolls and connecting the remaining elements in series across said line' for supplying increased JOSEPH ARTHUR DUMAS. 

